Combine accounts

Please provide more information on your requirements.

Do you currently have two separate Microsoft 365 Personal subscriptions and you want to switch to a different plan like the Microsoft 365 Family subscription?

Microsoft 365 accounts cannot be merged or combined into a single account. Personal Microsoft accounts and Microsoft 365 work or school accounts cannot be merged, and Microsoft personal accounts also cannot be linked, merged, or combined.

To avoid losing files or info, the only supported approach is to keep both accounts and manually move or share data between them, or consolidate into one account by copying content:

1. Decide which account will be kept as the primary Microsoft 365 account.
2. For email, export/import or move data:
   • Sign in to Outlook with the account being retired and export email, contacts, tasks, and calendar to an Outlook data file, then import into the primary account. Guidance is in Find and transfer Outlook data files from one computer to another.
3. For OneDrive files:
   • Sync OneDrive from the account being retired to a computer, then sign in to OneDrive with the primary account and upload or sync the files there. See Sync SharePoint files with the OneDrive sync client.
4. For OneNote:
   • Back up notebooks from the account being retired and restore them under the primary account using Back up OneNote and Restore notes from a backup.
5. If there are two separate Microsoft 365 subscriptions and the goal is to move everything into one tenant (for example, to combine subscriptions), follow the manual transfer guidance for moving data between Microsoft 365 accounts. This is a manual, time‑consuming process and requires recreating users and moving data item by item, as described in the manual transfer article.
6. After confirming all needed data is safely in the primary account and working, the other subscription/account can be left unused or closed, understanding that purchases, licenses, and some settings cannot be transferred.

If the subscriptions are Microsoft 365 Family, another option is to keep separate accounts but share one subscription (rather than trying to merge accounts), so both accounts retain their own files and identities while using the same paid plan.

References:

• Which account do you want to use?
• Combining Microsoft accounts
• Transfer data manually between Microsoft 365 accounts
• Manually transfer users' data between subscriptions
• I realize I have 2 different accounts. How do I combine the 2? - Microsoft Q&A